Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Application of zero-noise extrapolation-based quantum error mitigation to a silicon spin qubit
H. Sohn, Jae-Wan Jung, Jaemin Park +5 more·Oct 14, 2024
As quantum computing advances towards practical applications, reducing errors remains a crucial frontier for developing near-term devices. Errors in the quantum gates and quantum state readout could result in noisy circuits, which would prevent the a...
Robustness of near-thermal dynamics on digital quantum computers
E. Chertkov, Yi-Hsiang Chen, M. Lubasch +2 more·Oct 14, 2024
Understanding the impact of gate errors on quantum circuits is crucial to determining the potential applications of quantum computers, especially in the absence of large-scale error-corrected hardware. We put forward analytical arguments, corroborate...
QADL: Prototype of Quantum Architecture Description Language
Muhammad Waseem, Aakash Ahmad, T. Mikkonen +4 more·Oct 13, 2024
Quantum Software (QSW) aims to exploit the principles of quantum mechanics – programming quantum bits (QuBits) that manipulate quantum gates (QuGates) – for operationalizing quantum computing systems. QSW has emerged as a quantum-specific genre of cl...
Tackling Coherent Noise in Quantum Computing via Cross-Layer Compiler Optimization
Xiangyu Ren, Junjie Wan, Zhiding Liang +1 more·Oct 12, 2024
Quantum computing hardware is affected by quantum noise that undermine the quality of results of an executed quantum program. Amongst other quantum noises, coherent error that caused by parameter drifting and miscalibration, remains critical. While c...
Disentangling magic states with classically simulable quantum circuits
Gerald E. Fux, Benjamin Béri, Rosario Fazio +1 more·Oct 11, 2024
We show that states obtained from deep random Clifford circuits doped with non-Clifford phase gates (including T-gates and $\sqrt{\mathrm{T}}$-gates) can be disentangled completely, provided the number of non-Clifford gates is smaller or approximatel...
Quantum simulation of single-server Markovian queues: A dynamic amplification approach
Michal Koren, Or Peretz·Oct 10, 2024
Quantum computing is revolutionizing various fields, including operations research and queueing theory. This study presents a quantum method for simulating single-server Markovian (M/M/1) queues, making quantum computing more accessible to researcher...
Inequality constraints in variational quantum circuits with qudits
Alberto Bottarelli, Sebastian Schmitt, Philipp Hauke·Oct 10, 2024
Quantum optimization is emerging as a prominent candidate for exploiting the capabilities of near-term quantum devices. Many application-relevant optimization tasks require the inclusion of inequality constraints, usually handled by enlarging the Hil...
Securing HHL Quantum Algorithm against Quantum Computer Attacks
Yizhuo Tan, Hrvoje Kukina, Jakub Szefer·Oct 10, 2024
The advent of shared, cloud-based quantum computers introduces critical security vulnerabilities. This work identifies and demonstrates two novel attacks against the important HHL algorithm. The two attacks are the Improper Initialization Attack (IIA...
Simulating the Fermi-Hubbard model with long-range hopping on a quantum computer
Tatiana A. Bespalova, Karlo Deli'c, G. Pupillo +2 more·Oct 10, 2024
We investigate the performance and accuracy of digital quantum algorithms for the study of static and dynamic properties of the fermionic Hubbard model at half-filling with next-nearest neighbour hopping terms. We provide quantum circuits to perform ...
On the Computational Power of QAC0 with Barely Superlinear Ancillae
Anurag Anshu, Yangjing Dong, Fengning Ou +1 more·Oct 9, 2024
$\mathrm{QAC}^0$ is the family of constant-depth polynomial-size quantum circuits consisting of arbitrary single qubit unitaries and multi-qubit Toffoli gates. It was introduced by Moore [arXiv: 9903046] as a quantum counterpart of $\mathrm{AC}^0$, a...
Engineering the nonlinearity of bosonic modes with a multiloop SQUID
Ziyue Hua, Yifang Xu, Weiting Wang +8 more·Oct 9, 2024
Engineering high-order nonlinearities while suppressing lower-order terms is crucial for quantum error correction and state control in bosonic systems, yet it remains an outstanding challenge. Here, we introduce a general framework of Nonlinearity-En...
Toward hybrid quantum simulations with qubits and qumodes on trapped-ion platforms
Jack Y. Araz, Matt Grau, Jake Montgomery +1 more·Oct 9, 2024
We explore the feasibility of gate-based hybrid quantum computing using both discrete (qubit) and continuous (qumode) variables on trapped-ion platforms. Trapped-ion systems have demonstrated record one- and two-qubit gate fidelities and long qubit c...
Universal transversal gates
Pragati Gupta, Andrea Morello, Barry C. Sanders·Oct 9, 2024
A long-standing challenge in quantum error correction is the infeasibility of universal transversal gates, as shown by the Eastin-Knill theorem. We obtain a necessary and sufficient condition for a quantum code to have universal transversal gates and...
Shortcuts to adiabatic non-Abelian braiding on silicon photonic chips
Wange Song, Xuanyu Liu, Jiacheng Sun +6 more·Oct 9, 2024
Non-Abelian braiding describes the exchange behavior of anyons, useful for encoding qubits for quantum computing. Recently, this concept has been realized in classical photonic and acoustic systems. However, these implementations are constrained by a...
Application of large language models to quantum state simulation
Shuangxiang Zhou, Ronghang Chen, Zheng An +2 more·Oct 9, 2024
Quantum computers leverage the unique advantages of quantum mechanics to achieve acceleration over classical computers for certain problems. Currently, various quantum simulators provide powerful tools for researchers, but simulating quantum evolutio...
Experimental Realization of Direct Entangling Gates between Dual-Type Qubits.
Chenxi Wang, Chuanxin Huang, Hongxuan Zhang +6 more·Oct 8, 2024
Dual-type qubits have become a promising way to suppress the crosstalk error of auxiliary operations in large-scale ion trap quantum computation. Here we demonstrate a direct entangling gate between dual-type qubits encoded in the S_{1/2} and D_{5/2}...
N-qubit universal quantum logic with a photonic qudit and O(N) linear optics elements
A. Delteil·Oct 8, 2024
High-dimensional quantum units of information, or qudits, can carry more than one quantum bit of information in a single degree of freedom and can, therefore, be used to boost the performance of quantum communication and quantum computation protocols...
Explicit Quantum Circuit for Simulating the Advection–Diffusion–Reaction Dynamics
Claudio Sanavio, Enea Mauri, Sauro Succi·Oct 8, 2024
We assess the convergence of the Carleman linearization of advection–diffusion–reaction (ADR) equations with a logistic nonlinearity. It is shown that five Carleman iterates provide a satisfactory approximation of the original ADR across a broad rang...
Error mitigation and circuit division for early fault-tolerant quantum phase estimation
Alicja Dutkiewicz, S. Polla, Maximilian Scheurer +3 more·Oct 7, 2024
As fully fault-tolerant quantum computers capable of solving useful problems remain a distant goal, we anticipate an era of"early fault tolerance"where limited error correction is available. We propose a framework for designing early fault-tolerant a...
Generalised Quantum Gates for Qudits and their Application in Quantum Fourier Transform
Francesco Pudda, M. Chizzini, L. Crippa·Oct 7, 2024
Quantum computing with qudits, quantum systems with $d>2$ levels, offers a powerful extension beyond qubits, expanding the computational possibilities of quantum systems, allowing the simplification of the implementation of several algorithms and, po...